China Shipbuilding NDRI Engineering Co.

Shanghai, China

China Shipbuilding NDRI Engineering Co.

Shanghai, China
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Li Y.,China Shipbuilding NDRI Engineering Co. | Gu Q.-Y.,China Shipbuilding NDRI Engineering Co. | Fei Y.-C.,China Shipbuilding NDRI Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

The lattice diaphragm wall structures, a new kind of retaining wall, perform both the temporary retaining braces and the permanent structures. Researches the lattice diaphragm wall structures used in the project of 2nd dock of Waigaoqiao shipbuilding project are performed and a three-dimensional numerical simulation considering the interaction between the soil inside the lattice and the diaphragm walls is carried out in order to realize the space effect of this special structure. And the results are compared with the on-site tests data. The analysis shows that the lattice diaphragm wall do not need inner supporting system and can exert soil strength in lattice and effectively control the deformation of the retaining system by reasonably arrange the front, middle and back walls. The lattice diaphragm wall provides a solution for extension project of existing dock in rough fields.

Jiang J.,China Shipbuilding NDRI Engineering Co. | Gu Q.-Y.,China Shipbuilding NDRI Engineering Co. | Huang M.-S.,Tongji University
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

The load transfer method is adopted to obtain the simplified nonlinear analysis of settlement of vertically loaded single pile in dock pits after excavation. Considering the overconsolidation effect and nonlinear interaction between piles and soils, the theoretical model agrees with the fact quite well. The governing equation of single pile is solved by the finite difference method. The results of the finite element are compared with the calculated results, which proves the predictive capacity of the proposed method.

Cai Y.,Tongji University | Zhang X.,Tongji University | Pan X.,China Shipbuilding NDRI Engineering Co.
Ventilation 2015 - Proceedings of the 11th International Conference on Industrial Ventilation | Year: 2015

In this paper, the research object is the rigid legs toward to the sun of the gantry crane, because the leg illuminated by the sun for a long time, the surface temperature of the steel and the internal temperature of the air is too high. The thermal stress of steel was increased, and the life of the gantry crane was reduced. Vents are opened in the lower and upper section of the rigid leg, so as to let the air inside the rigid leg make convection with the outside air naturally and get away the internal heat, reducing the temperature of the rigid leg, so that the gantry can be long-term used. The feasibility of the design can be verified by using fluent simulation.

Dong Z.,China Shipbuilding NDRI Engineering Co. | Hu M.,China Shipbuilding NDRI Engineering Co.
Lecture Notes in Electrical Engineering | Year: 2011

Design is a complicated labor-intensive process, not only does it involve mental work, but also manual labor. To a design and research institute, it is a complex issue to properly evaluate the heterogeneous workload for a deign-related job. Therefore, it is crucial to precisely calculate cross-enterprise, heterogeneous workloads to support business goals and service levels. This thesis focuses on the discussion of the relevant calculation methods as well as the decision support system for workload under a cooperative work platform. © 2011 Springer-Verlag.

Zhu Z.,Jiangsu Provincial Technology Research Center for Water Transport Engineering | Zhou K.,China Shipbuilding NDRI Engineering Co.
Applied Mechanics and Materials | Year: 2012

In order to obtain more accurate results than the traditional method of wave statistics,the third-generation ocean wave model WAVEWATCH III (WW3) is applied to simulate the sea wave field of the Northwest Pacific, driven by the QSCAT/NCEP blended winds. Wave parameters are analyzed by statistical analysis method. The comparison of the significant wave heights between the simulation results and observation data shows that the correlation coefficient is greater than 0.9, indicating that the WW3 model can be applied in wave hindcasting of the Northwest Pacific. Furthermore, a post-processor system integrating data analysis and graphic display is established. A comprehensive evaluation is presented after analyzing the time and spatial distribution of computational wave heights. In conclusion, during the winter there is a big wave area in the Japan Sea. In the East China Sea, there is a period of relatively big wave in summer. Throughout the year, the average wave height is the maximum in the South China Sea. © (2012) Trans Tech Publications, Switzerland.

Liao Q.X.,Zhejiang Communications Quality Supervision | Cao J.,Anhui Expressway Holding Group Co. | Tang J.W.,China Shipbuilding NDRI Engineering Co.
Applied Mechanics and Materials | Year: 2013

This paper derives a numerical simulation of direct shearing test and model pile test based on the measured data of bored piles. Characteristics of the interface between bored pile and soil around it are analyzed. Laws of the magnitude and the distribution range of point resistance and frictional resistance of the bored piles in granular and clayey soil are obtained and the mechanism on them is explained. © (2013) Trans Tech Publications, Switzerland.

Zhou Y.,Tongji University | Yu H.,Tongji University | Qian J.,Tongji University | Qu G.,China Shipbuilding NDRI Engineering Co. | And 2 more authors.
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2015

Innovative types of joints are recently used to connect concrete filled steel tubular laminated (CFTL) columns and reinforced concrete beams. Aimed at exterior joints of ring beams and concrete filled steel tubular laminated (CFTL) columns, two monotonic loading tests and two cyclic loading tests for specimens with various radius-to-width ratios and three cyclic loading tests for specimens with various reinforcement ratios were carried out, to study the failure modes, capacity, stress distribution of bars and energy dissipation of the joints. The results show that: the joint of ring beam and CFTL column is feasible and appropriate design can guarantee the structural design philosophy of 'strong-column-weak-beam'. For the failure modes of the joints, frame beam failure mode is prone to occur as reinforcement ratio gets larger. The capacity of the joint increases within limits as the radius-to-width ratio gets smaller or the reinforcement ratio becomes larger. The stresses of the longitudinal bars of the anchorage zone of the ring beam are high, and the stresses of inner and outside longitudinal bars are not uniform since the inner longitudinal bars barely yield. For the capacity of energy dissipation, the equivalent viscous damping coefficients show that the energy dissipation capacity is high. ©, 2015, Science Press. All right reserved.

Li Y.,China Shipbuilding NDRI Engineering Co. | Gu K.-Y.,China Shipbuilding NDRI Engineering Co. | Lin J.,China Shipbuilding NDRI Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2013

Because of the limited conditions of the surrounding environments and the operating requirements, most of the foundation pits are asymmetric cylindrical shape. The design and analysis methods are proposed based on an asymmetric cylindrical foundation pit, which is 25 m in depth and 50 m in diameter and constructed by using asymmetric cylindrical bracing as a horizontal support. 2D and 3D methods are studied. The results indicate that a stiffness-reduced coefficient k for the 2D method for beams on elastic foundation should be considered to get reasonable results.

Dong J.-G.,Tongji University | Dong Z.-Z.,China Shipbuilding NDRI Engineering Co. | Yuan J.-Y.,Tongji University
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2013

A new method-the simplified theoretical method for calculating the settlement of piled box raft foundations for high buildings is proposed. This method is simple and convenient and can be calculated manually. Its calculated parameters are easy to be determined. The calculated value of settlement does not need the empirical coefficient for the depth modification. This method can show the nonlinear relation between the settlement and the load of the buildings. The comparison between the calculated and extrapolated measured values of the final settlement shows that the proposed method is feasible in Shanghai as well as in other cities. It can be supplement as the national standard "Code for design of building foundation" (GB50007-2002) considering the settlement calculation mode in shear stress of pile side.

Fan Y.,Tongji University | Quan Y.,Tongji University | Gu M.,Tongji University | Ni J.,China Shipbuilding NDRI Engineering Co.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2011

With a series of wind tunnel tests of rigid models for the single-span gable roof of industrial buildings of different sizes, the mean wind pressure fields under various wind directions and the effects of geometry and exposure on the wind pressure coefficients of the main wind force resistance systems are studied. The test results show that the height-width ratios and wind directions have greater effects on the mean wind pressure coefficients of the main frame beam roof than the aspect ratios and exposures. Moreover, the wind pressure characteristics are found to be significantly different between the main frame beam roofs of the central and the end bays. The suction on the main frame beam roof increases with the height-width ratio. The suction on the central frame beam roof increases with the increase of wind direction angle, and the suction on the end frame beam roof changes significantly with no obvious trend. Since the mean wind pressure is distributed approximately uniformly over the main frame column wall, the wind pressure coefficients can be calculated using the methods in the MBMA2002. Based on the test data, wind pressure coefficients of the main frame beam roof were fitted using the damped least squares techniques.

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